Possible Clues:

• (Dog's) front foot
• Animal's front foot
• ''Shake!'' offering
• Front part of animal in square hole, did you say?
• Part of a cat — FA power (anag)
• Pussy foot
• Hand of a quadruped
• What a dog 'shakes hands' with
• What Fido 'shakes hands' with
• Cat's front foot